//
//  ViewController.m
//  FancyButton
//
//  Created by MizushimaYusuke on 2017/03/30.
//  Copyright © 2017 MizushimaYusuke. All rights reserved.
//

#import "ViewController.h"
@import SpriteKit;

@interface ViewController ()
@property (nonatomic, weak) SKScene *scene;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self setupScene];
    [self createButtons];
}

- (void)setupScene {
    SKView *sv = [[SKView alloc] initWithFrame:self.view.bounds];
    SKScene *s = [SKScene sceneWithSize:sv.frame.size];
    [sv presentScene:s];
    [self.view addSubview:sv];
    self.scene = s;
}

- (void)createButtons {
    float d = CGRectGetMaxX(self.view.bounds) / 8.0;
    for (int i=0; i<50; i++) {
        float x = (i % 8) * d + 40;
        float y = (i / 8) * d;
        SKNode *button = [self createButton];
        button.position = CGPointMake(x, y);
    }
}

- (SKNode *)createButton {
    float l = arc4random_uniform(50) + 30;
    NSString *shapeType = arc4random_uniform(2) == 0 ? @"circle" : @"rect";
    float hue = arc4random_uniform(10) * 0.1;
    UIColor *colorA = [UIColor colorWithHue:hue saturation:0.5 brightness:1 alpha:1];
    UIColor *colorB = [UIColor colorWithHue:hue saturation:0.5 brightness:0.8 alpha:1];

    UIGraphicsBeginImageContextWithOptions(CGSizeMake(l, l), NO, 0);
    UIBezierPath *path;
    if ([shapeType isEqual:@"circle"]) {
        path = [UIBezierPath bezierPathWithOvalInRect:CGRectMake(0, 0, l, l)];
    } else {
        path = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(0, 0, l, l) cornerRadius:l * 0.1];
    }
    path.lineWidth = 3;
    [colorA set];
    [path fill];
    [colorB set];
    [path stroke];

    CGContextSetBlendMode(UIGraphicsGetCurrentContext(), kCGBlendModeClear);

    float r = l * 0.2;
    for (int i=0; i<4; i++) {
        float x = r * cos(M_PI * 0.5 * i) + l * 0.5;
        float y = r * sin(M_PI * 0.5 * i) + l * 0.5;
        CGContextFillEllipseInRect(UIGraphicsGetCurrentContext(), CGRectMake(x - l * 0.05, y - l * 0.05, l * 0.1, l * 0.1));
    }

    UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    SKTexture *texture = [SKTexture textureWithImage:img];
    SKSpriteNode *node = [SKSpriteNode spriteNodeWithTexture:texture];
    node.name = @"button";
    [self.scene addChild:node];

    return node;
}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    [self.scene enumerateChildNodesWithName:@"button" usingBlock:^(SKNode * _Nonnull node, BOOL * _Nonnull stop) {
        float duration = arc4random_uniform(60) * 0.1 + 0.5;
        [node runAction:[SKAction rotateByAngle:2.0 * M_PI duration:duration]];
    }];
}

@end